add vcglib

vcglib/wrap/gl/pos.h

@@ -0,0 +1,88 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004-2016                                           \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* This program is free software; you can redistribute it and/or modify      *   
+* it under the terms of the GNU General Public License as published by      *
+* the Free Software Foundation; either version 2 of the License, or         *
+* (at your option) any later version.                                       *
+*                                                                           *
+* This program is distributed in the hope that it will be useful,           *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+/****************************************************************************
+  History
+
+$Log: not supported by cvs2svn $
+Revision 1.1  2006/12/10 19:59:28  ganovelli
+first draft of the class the draw a Pos
+
+
+
+****************************************************************************/
+
+#ifndef VCG_GL_POS_H
+#define VCG_GL_POS_H
+
+// Please note that this file assume that you have already included your 
+// gl-extension wrapping utility, and that therefore all the extension symbol are already defined.
+
+#include <vcg/simplex/face/pos.h>
+#include <vcg/space/triangle3.h>
+
+namespace vcg {
+
+	template<class PosType>
+		struct GlPos{
+			typedef typename PosType::ScalarType S;
+			static void Draw(PosType & p){
+				Point3<S> bc = Barycenter(*(p.f));
+				Point3<S> mid = (p.f->P(p.z)+p.f->P(((p.z+1)%3)))*0.5f;
+				Point3<S> up = ((bc- p.v->P()) ^ (mid- p.f->P(p.z) )).Normalize();
+				Point3<S> ax = (  up  ^ (mid-p.f->P(p.z)) ) .Normalize();
+				S proj = (bc-mid)*(ax)*0.5;
+				Point3<S> bc1 =  mid+ (ax)*proj;
+
+		
+				glBegin(GL_TRIANGLES);
+				glVertex(p.v->P());
+				if( p.v == p.f->V(p.z))
+					{ glVertex(mid); glVertex(bc1);} 
+				else
+					{glVertex(bc1); glVertex(mid);}
+				glEnd();
+			}
+		};
+		
+	template<class VfIteType>
+		struct GlVfIterator{
+			typedef typename VfIteType::ScalarType S;
+			static void Draw(VfIteType & v){
+				Point3<S>	p = v.F()->P(v.I());// anchor
+				Point3<S> c[3];
+				for(int i = 0; i < 3;++i)
+				{
+					c[i] = v.F()->P(i)*0.9 + v.F()->P1(i)*0.05 + v.F()->P2(i)*0.05;
+					if(v.F()->VFp(i) != NULL)
+					{
+						glBegin(GL_LINES);
+						glVertex(c[i]);
+						glVertex( vcg::Barycenter(*(v.F()->VFp(i))));
+						glEnd();
+					}
+				}
+			}
+		};
+
+}//namespace
+#endif